Issue #2444775 by neclimdul: Remove dead ContentFormControllerSubscriber class

core/lib/Drupal/Core/EventSubscriber/ContentFormControllerSubscriber.php

-<?php
-
-/**
- * @file
- * Definition of Drupal\Core\EventSubscriber\ContentFormControllerSubscriber.
- */
-
-namespace Drupal\Core\EventSubscriber;
-
-use Drupal\Core\Controller\HtmlFormController;
-use Drupal\Core\DependencyInjection\ClassResolverInterface;
-use Drupal\Core\Controller\ControllerResolverInterface;
-use Drupal\Core\Form\FormBuilderInterface;
-use Symfony\Component\HttpKernel\Event\GetResponseEvent;
-use Symfony\Component\HttpKernel\KernelEvents;
-use Symfony\Component\EventDispatcher\EventSubscriberInterface;
-use Symfony\Component\DependencyInjection\ContainerAwareInterface;
-use Symfony\Component\DependencyInjection\ContainerAwareTrait;
-
-/**
- * Subscriber for setting wrapping form logic.
- */
-class ContentFormControllerSubscriber implements EventSubscriberInterface, ContainerAwareInterface {
-
-  use ContainerAwareTrait;
-
-  /**
-   * The controller resolver.
-   *
-   * @var  \Drupal\Core\DependencyInjection\ClassResolverInterface.
-   */
-  protected $classResolver;
-
-  /**
-   * The form builder.
-   *
-   * @var \Drupal\Core\Form\FormBuilderInterface
-   */
-  protected $formBuilder;
-
-  /**
-   * Constructs a new ContentFormControllerSubscriber object.
-   *
-   * @param  \Drupal\Core\DependencyInjection\ClassResolverInterface $class_resolver
-   *   The class resolver.
-   * @param \Drupal\Core\Controller\ControllerResolverInterface $controller_resolver
-   *   The class resolver.
-   * @param \Drupal\Core\Form\FormBuilderInterface $form_builder
-   *   The form builder.
-   */
-  public function __construct(ClassResolverInterface $class_resolver, ControllerResolverInterface $controller_resolver, FormBuilderInterface $form_builder) {
-    $this->classResolver = $class_resolver;
-    $this->controllerResolver = $controller_resolver;
-    $this->formBuilder = $form_builder;
-  }
-
-  /**
-   * Sets the _controller on a request based on the request format.
-   *
-   * @todo Remove when https://www.drupal.org/node/2092647 lands.
-   *
-   * @param \Symfony\Component\HttpKernel\Event\GetResponseEvent $event
-   *   The event to process.
-   */
-  public function onRequestDeriveFormWrapper(GetResponseEvent $event) {
-    $request = $event->getRequest();
-
-    if ($form = $request->attributes->get('_form')) {
-      $wrapper = new HtmlFormController($this->classResolver, $this->controllerResolver, $this->container, $form, $this->formBuilder);
-      $request->attributes->set('_controller', array($wrapper, 'getContentResult'));
-    }
-  }
-
-  /**
-   * Registers the methods in this class that should be listeners.
-   *
-   * @return array
-   *   An array of event listener definitions.
-   */
-  static function getSubscribedEvents() {
-    $events[KernelEvents::REQUEST][] = array('onRequestDeriveFormWrapper', 29);
-
-    return $events;
-  }
-}